#app{
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #e9967a;
  min-height: 100vh;
}

.text{
  font-size: 20px;
  font-weight: 700;
  color: #333;
  cursor: pointer;
}

.utils{
  position: absolute;
  bottom: 100px;
}

.set_speed{
  display: flex;
  align-items: center;
  padding: 0 10px;
  height: 50px;
  background-color: rgba(0, 0, 0, .3);
}

.input{
  width: 40px;
  height: 30px;
  text-align: center;
  color: #fff;
  font-size: 24px;
  background-color: #e9967a;
  margin-left: 10px;
}

/* 去掉右侧上下箭头 */
.input::-webkit-outer-spin-button,
.input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}